19.25Context diagram

Something as simple as:

       Customer Portal
             │
             ↓
        Mule API
        /       \
       ↓         ↓
Salesforce     Billing

Or:

ERP
 ↓ customer changes
Mule
 ↓
Salesforce

Salesforce CDC
 ↓
Mule
 ↓
Data Warehouse

It frequently exposes misunderstood directions immediately.